Fix most iMessage activation issues (iOS 10.3)

How to resolve most iMessage and FaceTime activation issues in under 5 minutes.

Works on iOS 7.1.2 and up, including iOS 10.3

Note: This procedure works only on original non-jailbroken unmodified iPhones

If you need any help, please feel free to contact me.

P.S. To see the questions and answers in the comments below this video, click on the option „Top Comments“ and change it to „Newest first“.

P.P.S. Make sure that you have YouTube / Google+ comments allowed in your settings in order to be able to receive a reply on your comment. .